| 大跨预应力混凝土连续箱梁桥日照温差效应 |
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| 引用本文： | 方志,汪剑.大跨预应力混凝土连续箱梁桥日照温差效应[J].中国公路学报,2007,20(1):62-67. |
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| 作者姓名： | 方志 汪剑 |
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| 作者单位： | 湖南大学,土木工程学院,湖南,长沙,410082 |
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| 摘 要： | 对某特大型预应力混凝土连续箱梁桥进行了连续4 d的温差效应观测,在实测数据的基础上论述了箱梁桥的温度场及其变化规律,继而提出了一种适合于中国中部地区的同时考虑箱梁竖向和横向温差的温度梯度模式,将该模式与实测资料进行了比较并分析了温差效应。结果表明:由该模式计算出的最大横向温差时刻与实测结果十分吻合,对箱梁桥日照温差效应的测试有参考价值。
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| 关 键 词： | 桥梁工程 预应力混凝土箱梁 试验研究 日照温差效应 温度分布 温度梯度模式 |
| 文章编号： | 1001-7372（2007）01-0062-06 |
| 收稿时间： | 2006-04-11 |
| 修稿时间： | 2006年4月11日 |
Sun Light Thermal Difference Effect on Long-span PC Continuous Box Girder Bridge |
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| FANG Zhi,WANG Jian.Sun Light Thermal Difference Effect on Long-span PC Continuous Box Girder Bridge[J].China Journal of Highway and Transport,2007,20(1):62-67. |
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| Authors: | FANG Zhi WANG Jian |
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| Institution: | School of Civil Engineering, Hunan University, Changsha 410082, Hunan, China |
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| Abstract: | According to 4 d continuous observation on thermal difference effect on a long-span PC continuous box girder bridge,the temperature field and its variation laws of box girder bridge were discussed based on measured data.A vertical and transverse thermal gradient model of PC box girder,which could apply in central China,was presented.This model was compared with the measured data and the thermal effect was analyzed.Results show that the maximal transverse thermal time calculated with the model agrees well with field test result and the model is of some value for the measurement of sun light thermal difference effect on box girder bridge. |
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| Keywords: | bridge engineering PC box girder experimental research sun light thermal difference effect temperature distribution thermal gradient model |
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